Monica *contains spoilers*
If Monica was the victim of the cult, why did she mess up with Loren?
I know there is one theory that anyone killed by the cult ends up controlled by them in afterlife, but I am not sure I agree. Loren is one story: she ends up killing innocent people and hence "loses her humanity". But Monica, to our knowledge, is purely a victim of the cult.
The other killed girls, when they make their only appearance, are creepy but not hostile to Loren, right?
What's your theory?